Let's all keep this in context. You have a group who owns an entire political party in the country now that shouts down liberal politicians for saying "all lives matter" and forces them to apologize. They have created an atmosphere of tension and divisiveness in this country the likes of which I've never seen in my lifetime. This was bound to happen at some point, sadly.
"Men willingly believe what they wish." - Julius Caesar, De Bello Gallico, Book III, Ch. 18